From 7a993324342d5542dcb40902eed097f7eaac3f1b Mon Sep 17 00:00:00 2001
From: Javan Makhmali <javan@javan.us>
Date: Wed, 3 Oct 2018 12:46:05 -0400
Subject: WIP: Image gallery support

---
 lib/action_text/attachment_gallery.rb | 62 +++++++++++++++++++++++++++++++++++
 1 file changed, 62 insertions(+)
 create mode 100644 lib/action_text/attachment_gallery.rb

(limited to 'lib/action_text/attachment_gallery.rb')

diff --git a/lib/action_text/attachment_gallery.rb b/lib/action_text/attachment_gallery.rb
new file mode 100644
index 0000000000..6f690551e6
--- /dev/null
+++ b/lib/action_text/attachment_gallery.rb
@@ -0,0 +1,62 @@
+module ActionText
+  class AttachmentGallery
+    include ActiveModel::Model
+
+    class << self
+      def fragment_by_canonicalizing_attachment_galleries(content)
+        fragment_by_replacing_attachment_gallery_nodes(content) do |node|
+          "<#{TAG_NAME}>#{node.inner_html}</#{TAG_NAME}>"
+        end
+      end
+
+      def fragment_by_replacing_attachment_gallery_nodes(content)
+        Fragment.wrap(content).update do |source|
+          find_attachment_gallery_nodes(source).each do |node|
+            node.replace(yield(node).to_s)
+          end
+        end
+      end
+
+      def find_attachment_gallery_nodes(content)
+        Fragment.wrap(content).find_all(SELECTOR).select do |node|
+          node.children.all? do |child|
+            if child.text?
+              child.text =~ /\A(\n|\ )*\z/
+            else
+              child.matches? ATTACHMENT_SELECTOR
+            end
+          end
+        end
+      end
+
+      def from_node(node)
+        new(node)
+      end
+    end
+
+    attr_reader :node
+
+    def initialize(node)
+      @node = node
+    end
+
+    def attachments
+      @attachments ||= node.css(ATTACHMENT_SELECTOR).map do |node|
+        ActionText::Attachment.from_node(node).with_full_attributes
+      end
+    end
+
+    def size
+      attachments.size
+    end
+
+    def inspect
+      "#<#{self.class.name} size=#{size.inspect}>"
+    end
+
+    private
+      TAG_NAME = "div"
+      ATTACHMENT_SELECTOR = "#{ActionText::Attachment::SELECTOR}[presentation=gallery]"
+      SELECTOR = "#{TAG_NAME}:has(#{ATTACHMENT_SELECTOR} + #{ATTACHMENT_SELECTOR})"
+  end
+end
-- 
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